Treatment with sodium nitroprusside improves the endothelial function in aortic rings with endothelial dysfunction

Author(s)

Buzinari, Tereza Cristina ; Oishi, Jorge Camargo ; De Moraes, Thiago Francisco ; Vatanabe, Izabela Pereira ; Selistre-de-Araujo, Heloisa Sobreiro ; Pestana, Cezar Rangel ; Rodrigues, Gerson Jhonatan

• Document type: Journal article
• Source: European Journal of Pharmaceutical Sciences; v. 105, p. 144-149, JUL 15 2017.
• Web of Science Citations: 2

Abstract

Purpose: Verify if sodium nitroprusside (SNP) is able to improve endothelial function and if this effect is independent of nitric oxide (NO) release of the compound. Methods: Normotensive (2K) and hypertensive (2K-1C) wistar rats were used. Intact endothelium aortas were placed in a myograph and incubated with SNP: 0.1 nM; 1 nM or 10 nM during 30 min. Cumulative concentration-effect curves for acetylcholine (Ach) were realized to measure the relaxing capacity. Intracellular NO were measured (by DAF-2DA probe) in HUVEC treated with SNP 0.1 nM or DETA/NO 0.1 mu M. The detection of intracellular superoxide radical (O-2(center dot-)) was obtained by using DHE probe. Results: Treatment of 2K-1C aortic rings with SNP (0.1; 1.0 and 10 nM) improved endothelium dependent relaxation induced by acetylcholine. This improvement induced by SNP was verified at the concentration of 0.1 nM, which does not release NO, suggesting that this effect was not induced due to NO release by SNP compound. Besides, we show that the cell treatment with 0.1 nM of SNP decreased the fluorescence intensity to DHE in cells stimulated with angiotensin II. These results indicate that SNP decreases the concentration of O-2(center dot-) in HUVEC cells. Conclusions: The SNP at a concentration that does not release NO inside the cells is able to attenuate endothelial dysfunction. (AU)

• FAPESP's process: 14/02250-7 - Pharmacological Characterization of the effects induced by ruthenium complex cis-[Ru(H-dcbpy-)2(Cl)(NO2-)] in endothelial dysfunction cells
• Grantee: Tereza Cristina Buzinari
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/24477-8 - Utilization of ruthenium complex as pharmacological strategy to revert and/or prevent the endothelial dysfunction
• Grantee: Gerson Jhonatan Rodrigues
• Support Opportunities: Research Grants - Young Investigators Grants